Improved well-boeing apparatus



@with gister @anni @time THOMAS R. WHITJEjAND W. G. BEDFORD, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNORS TOAW. G. BEDFORD AND WIMER BEDFORD, OF NEW YORK.

Letters Patent No.. 63,682, 'elated April 9, 1867; meterla-ted March 29, 1867.

IMPROVED WELL-BORING APPARATUS.

TO ALL WHOM IT MAY CONCERN:

Be it known that We, T. R. WHITE and W. G. BEDFORD, of Philadelphia, Pennsylvania, have invented certain Improvements in Well-Boring Apparatus; und we do hereby declare the following to be a-f'ull, clear, and exact description ofthe same, reference being had to the accompanying drawing, and to the letters of refer# ence marked thereon. I

Our invention relates to apparatus for operating rockdrills,.and consists of d'evices fully described hereafter whereby a drill is raised from and brought against the rock turned so that its position is changed at every blow and fed downwardat a speed exactly proportionate to the rapidity with which the rock is cut away.

In order to enable others skilled in the art to make and use our invention, we will now proceed to describe its construction and operation. On reference to the accompanying drawing, whichorms a part of this specification# Figure 1 is a sectional view of our improved well-boring apparatus.

Figure 2, a section on the line 1.-2, iig. I.

Figure 3,-a front elevation. j

Figures'l, 5, and'6, detached sectional views drawn to an enlarged scale.

Figure (a section on'the line 3 4, iig. 6.

Figure, a section on the line 5 6, fig. G.

Figure 9, a section on the line 7-8, fig. 1; and

Figure 10, a diagram intended to illustrate the operation of a portion of the apparatus.

Similar letters refer to similar parts throughout the several views. 1

To n base-plate, A, are secured two standards, B and B', which are connected together at the tcp by a crosspiece, O. In the upper ends of the standards turns a shaft, D, to the outer end of which is secured a disk,`E and in a groove, as, in the latter slides freely a block, F, to a pin on which is jointed the upper end of a connecting-rod, a. At the back of the disk E are hung two catches, b and b', on each of which is a lip, c, and

against each catch bears a spring which tends to press the said catch inward so that its edge shall project into the slot fr. On a bracket, O, at the upper end of the standard B, isa projection, d, which is bevelled at the inner side, as shown in fig. 9, for a purpose described hereafter. In a bracket, G, secured to the standard B,

slides a vertical rod, H, to the upper end of which is confined a swivel, e, and toithe latter is jointed the lower end of the rod a. On the under side of the swivel e is an annular ratchet, j, fig. 6, to the teeth of which iS adapted a spring pawl, z', on the rod A, so that the latter can be turned only in the direction of itsA arrow, figs, I and 6. To the lower end of the rod A is connected a screw, I, which turns in a nut, G', the latter being pre*` vented from revolving. by apin, g, which projects from the nut into a vertical slot y, in a plate, J', secured to the standard B. To ,the nut G a rod or tube, J, is so connected that it can revolve freely, the said rod or tube being attached to or forming a part of the drill-rod secured to the'drill or cutter. On a standard secured to the base-plate A turns a bevel-wheel, K, intofwhich gears a similar wheel, K', on the end of a shaft, D', the latter turning in the standards B B'; and through an opening in the centre of the wheel Kpasses the rod J, which is turned by the wheel but can -slide vertically independently of the latter. On the shaft D is a cam-disk, L7 in the inner face of which is an oval groove, u, and into the latterlprojects apin on a rod, M, which slides in suitable guides at the inner side of the standard B, a shoulder or projection, t, at the low'er end of the rod being adapted to the teeth of a ratchetovheel, N, secured to the shaft D'. On the bracket G is a tubular projection, f, on the inner side of which are inclined projections, n n, the upper end of one projection `extending over the lower end of the next, as shown in the diagram, fig. 10.. Through an opening in thc upper end of the rod H projects a bar, p, thc lower edge of which is bevelledas shown in fig. 6, and against the bar bears a spring, s,`

which tends to maintain it in the position shown in figs. 5 and 8. The parts of'thc machine are brought t0 the position shown in lig. 3; a rotary motion in the direction of its arrow is imparted to the shaft D, when the operation will be as follows: i

The block F is carried by the revolutionY of the disk Eto thefposition shownin iig. 1, when the lip c on the catch b will strike the inclined side ofi-the projection d, g. 9; the catch will be drawn back fromfbeneath the block F, and the latter will descend to the lower end ot' the slot fe. As the block descends it pushes back the catch 5', which, after the block reaches the limits of its downward motion, recovers its First position. On they descent of the block F the rods H and tubes .and rodsconnected therewith will also descend until the drill is brought against the rock. As the disk E continues vits revolution the rods and drill will be again raised until the catch Z7' is moved back, when tne block F, the rods and drill will descend as before; As the shaft D revolves a vertical reciprocating inotion is imparted to the rod M, the projection z'on which catches in the teeth of the ratchet-wheel N, and imparts an intermittent rotary motion to the shaft D', wheels K and K', and the drill rods, so that the drill is never brought twice in succession against the same portion of the rock. When therod H falls thc bcvelled edge of the bar 7' will be brought against the upper inclined edge v, fig. 10, of one of the projections n, and the rod will be turned (as the bar descends in contact with the edge c) in the direction of the arrows, figs. 10 and 5, and will be held in the position to which it is turned by the spring pawl z'. As the rod H rises the harp will strike the lower inclined edge w of the next projection n', and the spring s will yield, so that the bar can move back to the position shown in dotted lines, lig. 5, without the rod being turned. When the-bar is carried above the tubular projectionfthe spring s will force it back to the position shown in iig. 5, so that on the next descent oi' the rod the bar p will strike Ihe face 'zj oi" the projection 1t' beneath it, and the rod will thus be turned a part of a revolution in the. direction of its arrow, as before. As the rod is thusl turned the scrcwI will also be turned in the nut G', and the latter, and the rods and drill connected therewith, will be fed downward at a speed proportionate to that at which the screw is caused to revolve. When the rock is si) soft that the drill sinks deeply into the same the harp will bc carried at eaelrdownward movement to the lower end of the projection, which it strikes, and will on its upward movement be carried over the next projection, as described. The nut, rods, and drill will thus be fed quickly downward. When the rock is hard, however, the

drill will sink but slightly in the same, and the bar A7), instead of' passing directly to the lower end cfa projection,

will continue to strike its upper edge (descending a greater distance at each stroke) and will not be transferred to the next projection until, as the rock is cut away, the drill descendssufliciently for lthe bar to rea-ch thelower end of the projection first struck, when, n its upward movement, it will be carried over the next projection, as above described. The screw I is thus turned slowly, and the nut, rods, and drill are fed but slowly downward.

It will be seen from the above description that the drill is fed downward at a speed exactly proportionate to the rapidity with which the rock is cut away. When the nut G' has been carried nearly to the lower end of the screw I thc drill-rods are detached from the nut, thc latter is moved to the upper end ofthe screw, another section is secured inthe rods, and the nut is attached to thesame, when the operations proceed as before.

Without confining ourselves to the exact construction and arrangement of parts herein described, we claim as our invention, and desire to secure by Letters Patent l. The revolving disk E, with its slot a', and spring catches Z) b', or their equivalents, in combination with the sliding block F, connected to the drill-rods, and the projection d, or its equivalent, the whole heilig constructed and operatingsubstantiallyl as and for the purpose described.

2. The rod H and spring harp, screw I, and nut G', secured to the drill-rods, in combination with the i bracket G and its inclined projections n n, and the within-described operating devices, or their equivalents, the whole being constructed and arranged for joint operation substantially as specified.

3. The swivel e, with its ratchet j, in combination with the rod-H and its spring pawl z', substantially as and for the purpose set forth.

4. The shaft D', its wheels N and K', in combination with the rod J, wheel K, cam-disk L, and rod M, the whole being arranged and operating substantially as described.

-In testimony whereofwe have signed our naines to this specification in the presence of two subscribingwitnesses.

THOS. R. WHITE, W. G. BEDFORD.

Witnesses:

JOHN WHITE, CHARLES E. Fos'rsn. 

